Electric regulator.



F. E. RICKETTS.

ELECTRIC REGULATOR.

APPLICATION man SEPT. 2o. 191o.`

. Lm., Patented July 20, 1915.

2 SHEETS-SHEET 2.

lEoEEEsT EUGENE EICKET'Ts; 0E BALTIMORE, MARYLAND.

ELECTRIC REGULATOR.

Speciication of Letters Patent.

Patented July 20, 1915.

Application led September 20, 1910. Serial No. 582,957.

To all 'whom t may concew':

Be it known that I, FoRREsT E. RICKETTS, a citizen of the United States, residing in Baltimore and State of Maryland, haveinvented a new and useful Electric Regulator, of which the following is a specification.

This invention has reference to improvements in-electric regulators, and its object is tov provide a regulator which will main tain the characteristic to be regulated sensibly` constant.

The present invention relates to that class of regulators wherein contacts `are moved intoand out of engagement and the duration of the engagement of the contacts, or the time during. which they are disengaged is varied by changes in the characteristic of the current to be regulated. It has been proposed' to control such contacts by the electrical conditions of the. system being regulated, but in practice such controlling means is found 'defective in that thel slow response of the controlling means 'for the contacts vgivesftime for such building up of the characteristic to be regulated as to cause it to surpass the desired limit, and also the drop of the characteristic becomes too great, until finally there may vbe established a surge far beyond the limits of close regulation.y

-By the present invention but-one of the contacts isl responsive to the electrical conditions of the system, While the other contact is kept in constant motion to and from the first Contact to make and b-reak electrical connection therewith at frequent intervals, the periodicity of movement of the continuously movable contact being suchtliat at no time can the building up or drop of the current `characteristic being regulated pass beyond that necessary to bring thev system-to the normal or mean condition.

By Jcausing a continual'movement to and from engagingposition of one of the contacts by meansy yindependent of the electrical conditions of the system the periodicity of the make and break of the circuit at the contacts may be adjusted at will and to any desired degree in accordance with the demand, whereby there is obtained a closeness of regulation not possible in regulators where the approach and recession of the contacts is due solely to the electrical side. of' the system.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming a part of this specification, with the understanding, however, that the showing of lthe drawlngs. bemg diagrammatic does not confine the. invention to any special apparatus, nor 1s 1t necessary that the practical embodiment of the invention shall follow the exact arrangement shown in the drawings, the invention being susceptible of various modifications without material departure from the spirit and scope of the invention.

In the drawings Figure 1 is a diagram showing an alternating current system and a direct current system connected through a rotary converter with the controlling means of .the present invention incorporated therein. Fig. 2 is a diagram illustrating the application of the present invention to an alternating current generator. Fig. 3 is a perspective view of a contact actuating means which may be employed in connection with the present invention. Fig. et is a diagrammatic representation of another contact actuating means which 'may be used i'n connection with the present invention.

Referring to the drawings, and first to Fig. l, there is shown a rotary converter l having alternating current mains 2, 3, re spectively, and direct current mains 4, 5, respectively. The mains 2, 3 are connected to the terminals of the low voltage side of a transformer 6, and included in series in one of the mains, say the main 2, is a reactance coil 37, and in series in the other main, say themain 3, there is included one coil of a current transformer S, the other coil of which is connected to conductors 9, 10. The transformer 8 is so designed that the current supplied to the conductors 9 and `l() will bear a definite ratio to the current flowing inthe main 3. One terminal of the high voltage side of the transformer 6 is connected to a conductor 1l, and the other terminal of this transformer is connected through a switch 12to a conductor 13, the conductors 11 and 13 constituting the incoming power conductors. The switch l2 is only diagrammatically represented and is designed to change the ratio of lthe transformer G by cutting in or out a portion of the winding, one arm of the switch'havingy in its path suitable terminals l2 properly connected t0 the high voltage side of the transformer 6. The switch l2 is operated by two cores 14, l5 controlled by solenoids 1G, 17, respectively, the construction being 'such that when one solenoid is energized the switch W1ll be rocked to move over the contacts 12u in one l direction, and When the solenoid 17 is energized the switch will move over the contacts l2"L in the other direction. One terminal of the coil 16 is connected to one terminal of -the coil 17 by aconductor 18. The other There is provided a disk of non-mag-- I netic metal provided with a shaft 26 which or other of the contacts 20 and 22. The

may be mounted so that. the disk is free to turn, so far as its mounting is concerned, 1 n said mounting about the longitudinal aXls kof the shaft 26. The disk is provided on one side with an armterminating in a contact 27 movable into engagement with either of the contacts 20 or 22, but thecontact 27 is normally centralized between the contactsV 2O and 22 by springs 28, 29, respectively, attached to opposite sides of the arm carrying lthe contact 27, and one or other of these springs must be extended or compressed as the case may be in order that the contact 27 may be brought into engagement with one contact 27 is connected by a conductor 30 to another conductor 31 leading to the main 3.

The disk 25 is suspended in the eld of a horseshoe electro-magnet 32 having both of its poles nearone face of the disk, and substfantially equi-distant from the centerthereo of the disk and equi-distant from the poles of the magnet 32, is the pole of another magnet 33, which is an electro-magnet of the bar type. The magnet 32 is Wound With coils 34, connected together in series, and having their terminals` connected, respectively, to the conductors 9 and 10. f The magnet 33 is wound with a coil 35 which is bridged across the mains 2 and 3 by respective conductors 36, 37, and included in one of the conductors, say the conductor 37 is a resistance 38 designed to maintain the current in the coil 35 approximately in phase with the` voltage of the mains 2 and 3. v The purpose of the structures and` circuits Vso far described will appear hereinafter.`

The rotary converter 1 is provided with a field coil 39 having one terminal connected by a conductor 40 With the main 5, and the other terminalgconnected by a conductor 41 to one side of a rheostat 42 of the adjustable type and in series with the field 39. The other terminal of the rheostat 42 is connected to a conductor 43 leading from the main In operative relation to the other facel the resistance 42 and the generator 45 is in` parallel with the, field coil 39. The generators 44 and 45 are mounted on a common shaft 48 driven by a motor 49 of any suitable type,l and which maybe taken as indicative of any suitable means for applying power p to the shaft .48.

The generator 44 has a iield coil 50 and the generator 45 has a field coil 51, which iield coils Aare connected together in series y by a conductor 52. These tWo lield coils Ain series are bridged across the mains 4 and 5 by conductors 53 and 54. A movable meniber 55 constituting a switch arm is connected 1 to the conductor 52 and is capable of moving about an aXis which may be coincident With its connection with the conductor. 52. AThis movable member or arm A55 has in its path a contact 56 and is normally con-w strained away from its contact by. a spring 57 and may be moved against the action of the spring by a magnet 58. The movement of the arm 55 under the action of the spring 57 is limited by a contact 59. An adjustable rheostat 60 is connected on one side of the4 contact 56 and on the other side by ak conductor 61` to the conductor 53, and a rheostat 62 is connected on one side to the contact 59 and on the other side to the con-v ductor 54. One terminal of the coilof the magnet 58 isvconnected to vthe conductor 24, While the other side of the magnet 58 is connected by a conductor 63 to a switch lever 64 having at one end a flexible extension ,65, which may be in the form of an elastic metallic strip, and this extension 65 carries at its outer end ya contact 66, in the path of which is another contact 67 on the free end` of an elastic strip or arm 68, which may be appropriately secured at the other end to a fixed member 69, and there also connected tothe conductor 31. The elastic stripy 68 carries a block 70'v in the path of a cam 71 the drawings, but which may be considered as any suitable ,type of motor capable of running at a substantially constant speed when properly set, but it will be undervaried by any appropriate means to any desired degree. The shaft 72 also Acarries a disk I the field of a permanent magnet 75 mounted on an adjustable support 75, so that the magnet may be .made to embrace more or less of the disk to thereby vary the speed of stood that the speed of, this motor may be 4 of non-magnetic metal rotatable in one of the direct. current mains, say the main 5, and the other side of which is connected by `a conductor 80 to the other current main, say the main 4, so that this coil is energized by the voltage of the mains 4 and 5. The core 76 is lalso under the controlv of another coil 81, one terminal of which is connected'by a conductor 82 to one of the direct current mains, say the main 5, while the other side of this cil is connected to. another conductor 83-to thek same main 5,

and between the point of connection of these conductors 82 and 83 with the vmain 5 there is introduced a. resistance' 84, this resistance.

being` in series'inthe -said main; The coil 81 is therefore in parallel with the resistance 84 andV is energized by the current of the mains 4 and 5. The magnetism of the magnet made up of the core 76 and coils 78 and 81 is, therefore, the resultant ofthe current and voltage ofthe mains 4 and 5.

The apparatus indicated in Fig. 1 operates to maintain a constant voltage of the mains 4 and 5, and at the same time holds the current and voltageof the mains 2 and 3 in phase. I Y

. Let it be assumed that the motor 73 is running at a. practically constant speed, and, therefore, the action of the cam 71'on the elastic strip or contact arm 68 is to cause the -latter to move up and down through a slight distanceyat each revolution of the cam, the parts being properly proportioned for this purpose ,'Let it also be assumed that the voltage of thev mains 4 and 5 has increased sufficientlyl to carry the contact 66 out of engagement with the contact 67 by the energization (of the coil 7 8V to an extent sufficient to raise the core 7 6to the proper degree for-luthis purpose. The movement of the ycontact 66 out of engagement with the contact 67 will interrupt the current flowing in the magnet 58, since the circuit including the contacts 66 and 67l is from the main 3 through the conductor 31 -to the arm 68, thence by way of the contacts 67 and 66 to the extension and lever 64 'to the conductor 63, thence through the coil ofthe magnet 58, returning to the main 2 by way of the conductor 24. While the magnet 58 is in the energized condition, the leve-r 55 has been pulled toward its magnet against the action of the spring 57, and the lever has been brought into engagement with the contact 56. Now, however, the denergization of the magnet 58 has allowed the spring 57 to pull the arm 55 into engagement with the contact 59 and consequently all the current `flowing from the conductor 53 must pass through the field coil 50, thus raising the voltage of the generator 44 and therefore -the voltage across the resistance 42 by send- 1ng more current therethrough, but the current passing through the field coil 50 will divide between the resistance 62 and the field coil 51, which will weaken the strength of the field 51, so that the voltage of the generator 45 will decrease, and the generator 45 will, therefore, supply less current tothe field coil 39. In this way the strength of the field 39 is weakened first by increasing the voltage drop across the resistance in series with it, and second, by decreasing the voltage drop across itself. of the field 39 decreases the voltage of the mains 4 and 5 by causinglthe current in the mains 2 and 3 to lag behind the vol-tage. This drop in voltage will be increased b y the reactance 7. As soon as the current in the mains 2 and 3 lags behind the voltage, the magnetism of magnet 32 will lag behind that of magnet 33 and this produces a This weakening rotating field in the non-magnetic disk 25,

causing it to rotate in a direction to bring the lcontact 27 into engagement with the contact 20, thus establishing a circuit from the main 2 by way of the conductors 24 and 23 to the conductor 18, thence through the coil 16 by the conductor 19 to the contact 20, returning to the main 3 by way of the contact 27 and conductors 30 and 31. This causes a movement of the switch 12 in a direction-to cut in some of the turns of the coil of the transformer 6 connected to the mains 11 and 13, and this will decrease the voltage on the mains 2 and 3 and consequently the voltage of the mains 4 and 5; The decrease of voltage in the mains 4 and 5 causes a. wea-kening of the coil 7 8 and the core 76 will, therefore, drop, turning the lever 64 on its pivot supports and bringing the contact 66 into engagement with the contact 67 during a. portion of the cycle of movement of the latter. During the period of Vengagement of the contacts 66 and 67, the magnet 58 is energized, and the arm 55 is drawn against the action of the spring 57 away from the contact 59 and into engagement with the contact 56, thus depriving the field 50 of part of the current flowing from conductor 53 to conductor 54, such current fiowing through the resistance 60 which is now in parallel with the field 50. `The effect of this is'to lower the voltage in the generator 44 and thus decrease the voltage drop across the resistance '42. New. how ever, all of the currentflowing through the resistance 60 and field coil 50 passes through the field coil 51, thus increasing the voltage of the generator 45, so that it takes less current in phase relation to the voltage of themains 2 and 3.

The contact arm 55 will continue to vibrate between the contacts 56 and 59 engaging each contact once during each revolution of the eccentric 71, but the duration of time during which each contact is engaged will depend upon the time during which the contacts 66 and 67 are together, and this will depend upon the position Which the core .76 occupies with relation to the coil 78, such position depending upon the voltage of the mains 4 and 5. When the voltage of these mains 4 and 5 is below the predetermined mean, the time of engagement of the contacts 66 and 67 is increased, causing the voltage of the mains 4 and 5 to rise, and when the voltage of these mains is above normal, the time of engagement of the contacts 66 and 67 will decrease, thus causing' the voltage of the mains 4 and 5 to fall. In this way the voltage of the mains 4 and 5 is regulated by varying the phase relation of the current and voltage of the mains 2 and 3.

lVhcn the current on mains 4 and 5 increases. the voltage drop across the resistance 84 increases, which causes an increase of current on the coil 81. This opposes the magnetism of the coil 78, and a higher voltage on the mains 4 and 5 is then required to maintain a balance between the pull of the coil 78 and the weight of the core 76. The regulation will, therefore. operate to.. increase the voltage as the load increases.

lVhen the current in mains 2 and 3 lags behind the voltage, a rotating field is set up in the disk 25 by the magnets 32 and 33, which field tends to rotate the disk to bring contact 27 into engagement with the contact 20, causing the switch 12 to cut in more turns of the primary of the transformer 6, which, as before explained. lowers the voltage of mains and 3. and thereby of mains 4 and 5. This a flects the contacts 66 and 67 to increase the licld 39, thus causing the current to advance in phase relation to the voltage in the mains 2 and 3. 'hen the current of mains 2 and 3 leads the voltage. thc rotating licld sct up in the disk 25 by the mag` nets 32 and 33 causes this disk to bring the contact' 27 into engagculent with the contact 22. thus causing an operation of thc switch 12 to cut out turns of the primary of the transformer 6 to raise the voltage ofthe mains 2 and 3 and thereby that ofthe mains 4 and This affects the contacts C6 and 67 yphase with the voltage,

to decrease the current in the field coil 39,

whichl delays the current in relation to the voltage in mains 2 and 3.

When the current in mains 2 and 3 is in the magnetism of the magnet 32 will be simultaneous with that of magnet 33 and consequently there is no force developed tending to rotate the disk 25.

Referring now to Fig. 2, there is shown an alternating current generator 85 With armature leads 86, 87 and field leads 88, 89, which latter are connected to the armature terminals of a small generator 90 constituting an exciter, which latter is provided With a iield coil 9 1 and a resistance 92 in series across the armature leads of the exciter by conductors 93 and 94. There is provided an automatic switch comprising a switch arm 64 With an extension a and a contact 66I1 at its free end like the similar members 64, 65 and 66 of Fig. 1. That end of the lever 64 remote from the Contact 66a is connected to a core 76a like the core 76 of Fig. 1, and this core is under the control of tWo coils 78 and 81, as in Fig. 1, and is also provided with a dash pot 77 as in Fig. 1. In Fig. 2 the contact arm 68 is replaced by a bell crank lever 95 having at the end vof one arm a contact 96 in the path of the contact 661. The other end of this lever is extendedjn the form of a substantially pendent rod 97 carrying an adjustable weight 98 and this rod 97 is engaged by one end of another rod 99 fast to an anchor escapement 100 controlling an escapement wheel 101 like the controlling escapement of an ordinary clock. The escapement wheel 101 is assumed to be driven by a motor symbolized by the wheel 102 driving the escapement wheel 101. Any type of Imotor capable of running at any desired speed with substantial constancy for suitable periods of time will answer. The rod 97 with its weight 98 is in effect a pendulum, the speed of which is controllable by the weight 98 adjustable along the rod 97. The contact lever 04 is connected to one side of the resistance 92 by a conductor 103 and the lever 95 is connected to the other ,side of the resistance 92 by a conductor 104, this last named conductor connecting, to the lever 95 preferably atthe pivot point thereof as indicated at 105. The coil 78aL is bridged across the terminals of the secondary coil of a voltage transformer 106 by means of conductors 107, 108, and one of these conductors, say the conductor 108 includes a resistance '109` the object. ofwhich is to keep the current in coil 78 approximately in phase with the voltage of the transformer 106. This is made necessary by the fact that the current in this circuit is of an alternating character, and would. therefore. lag behind the voltage if the circuit did not contain an ohmic component. The prin'larv coil of the transformer 106 is bridged across the mains 86,

' 8,7 ,f0k Ahatthel current applied to the coil 78?? Iis in l pifoportion` to the voltage of l said mains. Ifr, y magril ism!ofcoil78i and is connectedto' the canaria. 12,111.1 112; :The primary con of thetransformer 110`isfi`nseriesfv`vith one of the.mains86,",87,l say the mainf87,"`and furnishes: toj'ythe Carlisle aimaient: aways in,

y proportion to]y the current-f'iitnvingz in the mam onI the' fcor'ev 7 6a'ivill bethe resultant of that 71a and'81a."

sa fe" function"V as "the'one simi-r lalva ane'edfinls- 1f. ipwhen thargulawrshown iii-Fig- 2 is: in operati y"the fcfontact96is keptin motion the vinging of "thependulnm lever 95 dara, balilla-motor 1102irm 11g1fpfhe,escape-v Ient 100,'"1011, l'Vhe-n" theVoltage in the 5:86-87N1ises above a predetermined he voltage"supplied byf' 'the ktrans- @all het. 9,6 iter.' .4ISh.' .rterV pendii f time, "during @acht ycle ofthe' @maxime thenergi'z'ation; of

th'geJ Aoil 8** being: suchf to draw the core: v`'t 't to "a further eXtentth'an formerly,kr

fo' ng; the"V vContact' 66av a directiony y 'he contact '796 .to ia 'commensurate A henf'thec'ontacts 66a' and 96ar`ein engagement, the resistance 92 fiszshort '.Ci'r'- rvcuited,andthe yvoltage of the exciter"90 is t v -e d. rdeaeasesixfhe weightsof theme v i @overbalance Ithe pull of thecoil p78** WhiCh'has been correspondingly weakened` by the decrease of voltage of the mains 86 and 87, so that the 'contacts 66? and 96 will remain' inengagement for a longer time'to cause a rise in voltage of the exciter, and by such rise, a rise in voltage of the generator. When the load on ythe "mains 86 and 87 increases, the current supplied by the transformer 110 to the coil 81a will increase, and becausev 0f the relation of the coil 81a to the coil 7 Sfwill tend-to demagnetize the said coil 78", so that a higher voltage on the mains 86 and 87 is required/to establish a balance between the p ull of the coil 78'?1 and the Weight of the core 76". Therefore, the regulator Will operate to increase the volt-l ageas theeload increases, and this is equally true of the same structures of Fig. 1. e5 Fig.V 3 is a slightly modiiied form of the he coilf81a; is Wound: Ito oppose the E n'ding'jof 'fatransformer -11-0 by T116? isi alsojcontrolledeby A@fairedashpot-nia ersed by a rod 114 to which the springt-arm other 'end of -the rod 11114; carries:- a .coref116 entering f VAcoil l 117,1 one terminal fof which latteris connected vib .ifahlconductor r11-81 t as indicative" of :anyfsuitable s'ourcejof.-'elec-r tricalfe'l'i'e'rgyg'; and? the "-otheri'fsidefgof the bate. tery 119 is connectedl by a conductor1201-.toy al contact' kv'Iterminal'fll:fi:i f 'lhe'k other-'side of thecoil 11T-fis connected 'telakv contact 'termi-1 'astic.,'I-`he core n dash ipotz 124 :prei vided with ley-pass :125,'1Wherebythe'effect v Af;.regulated.1The:tends ency of.- the'r'sprin 115 .Sis :tomaintainthe contacts' 66, and167. fseparated', andi also yto move the ycontact 122fintoengagement with .the contact 121'.. As-soorrasfthecontacts :12,1 "andi 122:v are brought;y into 1engagement7,'. cur.- y

- 117 and 'thelcore 116fis r1 drawn into the; coil 117 in a directieni.ItofeXpandA thels'p'ring. 115 and Ibring' thefc'onta'ct' 67 iinto .engagement with the contacti66; oscillations -thecore 116 and'arm '68 beingdeadened by the dash pot 124.,l By having a spring finger 123 carrying the Contact 122, the engagement of 4the contacts 121 and 122 is sufficiently prolonged to give the 'desiredextent of travel of thecontact 67. The periodicity of vibration of the contact 67 may be readily determined or changedby proper proportioning the spring 115 and the relation of the contacts 12 and 122-. Fig. 4, t e arm68 may and ifnon-elastic may be pivoted at the end remote from the contact 67 as'indica-ted at 126 in Fig. 4. y

It isy desirable that the core 76 of Figs. 1, 3 and 4 or 7 6a of Fig. 2 should maintain a position relative to the controlling coil or coils due solely to the magnetic conditions established in these' coils, and this core In the structure shown in f or may not be elastic,`

should change its position only in accordance with changes in such magnetic conditions. yNo sensible changes in the position of the core should occur under the action of the constantly moving contact. For this reason one or both of;- the contacts `66 and 67 of Figs. l and 4, or 66a and 96 of Fig. 2 or 66 and 71 ofl Fig. 3, should be elastically mounted. The constantly movableland positively driven contact has a certain predetermined range of movement considering the other contact as not present. The matching contact is positioned'with relation to the constantly movable contact to be engaged thereby during 'a portion of the travel of the constantly lmovable contact, the time duration'of engagement depending upon the position of the contact controlled vby the electrical conditionsof the circuit. Since the-contact controlled by the circuit to be regulated mustnot sensibly change its position except in response to changes in the electrical vconditions of the circuit, but still respond promptly to such changes, the'dash pot control is provided. The changes in the electrical conditions 'of the circuit are not so rapid but that the dash pot Willpermit the response of the contact controlled thereby to such changes in the electrical conditions, while said dash vpot is practically unresponsive to the comparatively rapid movements of ythe positively and constantly moved contact. one of'both contacts-compensates -for the differences between the movement ofthe two contacts, and, also, provides for the longer or shorter period of `engagement of the contacts. n

No definite speed of movement of the constantly actuated contact can be given, since the speed of movement may be varied Within quite Ywide limits. It has been found, however, that good-results"have been obtained when the speed of movement of the constantly actuated contact has been about two hundred vcycles per minute. The rate of `vibration of the constantly driven contact, considering this contact as a vibratory contact, may be much lessthan two hundred per minute, but the speed must be determined rby the electrical conditions present in the circuit, one speed of vibration answering well for one circuit, and another speed of vibration for another circuit. When the circuit between the contacts is completed, the change of voltage due to the action of the regulator might reach the proportions of a surge if the compara-tively slow responding electrical conditions were relied upon because the break ofthe circuit at these contacts, and then the reverse action might cause a drop in excess 'of the desired amount, andthis is the actual occurrence in practice where the variations sometimes become excessive instead of the regulator hold- They elasticl mounting of' ing the variations close to the desirable mean. lVith thevpresent invention the time period of engagement of the contacts is determined by the constantly movable contact as modified by the electrical conditions of the circuit, but this time of contact never exceeds the period of the constantly movable cuit, a dynamo-electric machine associated therewithand an exciter for thefdynamoelectric machine, of a regulator comprising coperating contact members, means for varying the position of one of said contact members in accordance with an electrical Q 'The combination with an electricalicirn condition of the said circuitl and independently of the condition of the exciter, rand means for continuously vibrating said contactjmembers into and-out of engagement independently oft-he conditions of theaforsaid parts. l f 3. The combination with an electrical circuit, a dynamo-electric machine associated therewith, and an excitery for the dynamoelectric machine, of a regulator 4comprising coperating contact members, one of which is resiliently mounted, means for varying the position of one of said contact members in accordance with an` electrical condition of said circuit and independently of the condition of the exciter, and means for continuously vibrating said contact members into and out of engagement independently of the'conditions of the aforesaid parts.

4. The combination with an electrical circuit, a dynamo-electric machine associated therewith, and an exciter for the dynamoelectric machine, of a regulator comprisin coperating contact members, one of whic is resiliently mounted, means for varying the position of one of said in accordance with an electrical condition of said circuit and independently of the` condition of the exciter, anda cam for'continuously vibrating said contact members into and out of engagement indeendently of the conditions of the aforesaid, parts.

5. The combination with an electricalcircuit, and a dynamo-electric machine associated therewith, of a regulator comprising contact members coperating contact members, one of which is resiliently mounted, means for varying the position of one of said contact members in accordance With an electrical condition of only said circuit, means for retarding movements of the latter contact member, and meansl for continuously vibrating said contact members into and out of engagement independently of the conditions of the afore said parts. 6. An electrical regulator comprising cooperating contact members,I lectrical means for actuating one of said contact members, and a continuously actuated cam for actuating the other member.

7. An electrical regulatorr comprising cooperating contact members, one of Which is resiliently mounted, electrical means for actuating one of said contact members, and a continuously actuated cam for actuating the other member. 1

8. An electrical regulator comprising cooperating contact members, and electrical means anda rotatable cam for separately causing relative movements of` the contact members.

9. An electrical regulator comprising cooperating contact members, one of which is resiliently mounted, and electrical means and a continuously actuated rotatable cam for separately causing relative movements of th'e contact members.

10. An electrical regulator comprising cooperating contact members, a resilient supporting arm for one of said members, a cam for' actuating said arm, a resilient mounting for the other member, and electrical means forA actuating the latter member.

11. An electrical regulator comprising cooperating contact members, resilient mountings for each of'said members, a cam for actuating one of the contact members, and electrical means Jor actuating the other member.

12. An electrical regulator comprising two movable cooperating contact members, a rotatable cam for causing said members to engage and disengage, and means for rendering the movements of one of said members sluggish.

13. An electrical regulator comprising two movable coperating contact members, a continuously rotating shaft, means 'for causing the contact members to engage and disengage at a rate proportional to the speed of rotation of the shaft, and means for rendering the movements of one of said members sluggish. 5 i

14. An electrical regulator comprising tw'o movable coperating 'contact members one of which is resiliently mounted, a continuously rotating shaft, means for causing the contact members to engage and disengage at a rate proportional tothe s eed of yrotation of the shaft, and means or rendering the movements of one of said-members sluggish.

15. An electrical regulator comprising cooperating contact members, and means .for causing relative movements of the said members including a continuously-actuated cam and electrical means separate therefrom.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

FORREST EUGENE RICKE'ITS. Witnesses:

DoUGLAss C. GosNnLL, JOHN T. FARDY. 

